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High-speed railway is being developed rapidly; its safety, including infrastructure and train operation, is vital. This paper presents a railway-subgrade vibration monitoring scheme based on phase-sensitive OTDR for railway safety. The subgrade vibration is detected and rebuilt. Multi-dimension comprehensive analysis (MDCA) is proposed to identify the running train signals and illegal constructions...
This paper proposes two algorithms, dynamic frequency-space image and threshold sieving to deal with signal of vehicles moving in Φ-OTDR. Satisfactory results of field experiments for tracking of single car and multiple cars are presented, indicating Φ-OTDR is suitable for vehicle tracking.
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